To Vekin's comment... Did you even read any news about the movie?!? It's not the first time I've seen you post things that you seem to take from out of nowhere and that don't even make any sense... here, I'll explain it slowly to you: The Predators have been coming to earth for thousands of years and at some point, they brought a Queen alien and they put her in a pyramid that the Aztecs had built in honor of the preds. They tied her up in some special chamber and forced her to produce eggs... Then, the pred had Aztec that sacrificed themselves for their Gods ( a.k.a.: the preds ) to act as a 'host' for the face-huggers when they hatched... that way, they could easily produce a lot of aliens warriors, drones, etc. What I think is that the newly formed aliens are probably locked up, maybe in a special place that allows them to live longer ( hibernation? ) and once they are ready to hunt, the preds release the aliens and they try to kill them. Long live Z and k!